E. Boroni et al., REACTIVITY OF DOUBLE THIOUREAS TOWARDS METAL-COMPLEXES - SYNTHESIS AND CRYSTAL-STRUCTURE OF [((MU-H)RU3(CO)9)2(SC(NPH)N(ET)(CH2)2NH(PHN)CS)], Journal of organometallic chemistry, 451(1-2), 1993, pp. 163-168
By reaction of PhNCS with (Meo)3Si(CH2)3NH(CH2)2NH2 (2:1 molar ratio),
a substituted dithiourea has been obtained which affords a new functi
onalized xerogel (XGditu) by hydrolysis and polycondensation with (EtO
)4Si. This material is able to bind metal species, giving systems of p
otential interest in catalysis. In order to ascertain the nature of th
e tethered metal species, the non-siloxanized dithiourea PhNHC(S)N(Et)
(CH2)2NHC(S)NHPh (2) has been prepared. It reacts with [Ru3(CO)12] to
give the complex {(mu-H)Ru3(CO)9}2(SC(NPh)N(Et)(CH2)2NH(PhN)CS} (4), w
hich contains two distinct hydrido carbonyl clusters bound to the two
deprotonated thiourea groups.